If you've been waiting to pre-order the Samsung Galaxy S4, today's the big day, and you're not short of choices when it comes to retailers or networks.

The phone is up for pre-order on all of the UK's major networks - EE, Three UK, Vodafone, O2, Orange, and T-Mobile - as well as Carphone Warehouse, Phones4u, and Amazon. Don't know which network to go with? Let's break it down for you...

Facebook has been slowly rolling out VoIP calling to its Messenger app in an effort to make it the single, unified source for all your communication needs (before Google can). Today, it apparently took another baby step forward by granting UK users of the mobile app the ability to connect for free (minus data charges where applicable) to anyone they're friends with.

At the moment the service doesn't seem to have rolled out to all users yet, and it may even still be a bit buggy (the slow expansion is partially to conduct tests, after all).

Rumblings of delays aside, we've been waiting to hear more concrete information about the arrival of the new HTC One. Well, today we got something closer to solid facts. According to the company itself, the new flagship phone should launch in the UK, Germany, and Taiwan next week. Dates may vary by local carriers, but it won't be too long of a wait.

As for the rest of the world, more countries in Europe, as well as the North American and Asia-Pacific regions should see the handset land 'before the end of April.' No specific dates are given, nor any carrier information, but we already know that in the U.S.

Just a few days ago, we saw a hint that Google might be ready to expand its gift card program to the UK. Today, our suspicions are confirmed as the cards have started showing up at the distinctly British Tesco grocery stores. So far the only denominations confirmed are £10 and £25, though the support pages indicate that there are some £50 vouchers running around out there somewhere.

So far, Google has only seen fit to launch gift cards in the US and the UK.

A mere seven months ago, we saw the launch of Google's Play Store gift cards, a much wished-for addition to the store front that made gifting the store's digital content almost as easy as it should be. Unfortunately for international users, though, the cards were only destined for the US at launch. When "redeem pages" popped up in the UK's online and device-based stores in mid-December, many thought the cards would hit retail stores in time for the holidays.

HTC may not be too terribly specific about when it intends to release its newest flagship, aside from a vague March-ish timeline, but Vodafone and Clove are more than happy to fill in the blank space: March 15th is the date. At least if you're in the UK, looking to get this piece of hardware on Vodafone, or order from Clove.

Not only does Clove's ordering site indicate this as the date the first shipments should come in, but Vodafone confirmed the date in a statement to AP.

The ZTE Blade III has been available outside of the UK since September of last year, but it's only just making its official appearance on British shores now, as a Virgin Media exclusive, for now at least.

The budget smartphone, which comes with a 4-inch capacitive display, 1GHz CPU, 512MB of RAM and 2.5GB of internal storage, is available for just £79.99 through Virgin Media on pay-as-you-go. If you'd prefer to be on a monthly contract, prices start at £18 for non-Virgin customers, whilst those who have an existing Virgin Media package can get it for £13 a month.

United Kingdom readers, never say we didn't do anything for you. If you've been patiently waiting for Sony's new flagship phone, you can pick up some pretty sweet studio-quality headphones at the same time. If you pre-order the Xperia Z through one of Sony's partners, you can pick up a pair of Sony MDR-1R headphones for free, gratis, and nothing.

You don't even have to buy it outright - O2 and Three UK are both offering subsidized versions which qualify for the free headphones.

Yesterday, Google re-released the Nexus 4 in the U.S., Germany, and Canada. We also heard that the UK, France, and Spain would be the lucky ones today. So far, everything seems to be panning out nicely, as both the 8GB and 16GB versions of the device – as well as the bumper case – just went on sale in the UK. We're still waiting to confirm availability in France and Spain.